53256domain: NAppears in sequencesG.f. satisfies A(x) = x*(1+4A+A^2)^2/(1+A+A^2).at n=6A101487Numbers of the form k + wt(k) for exactly four distinct k, where wt(k) = A000120(k) is the binary weight of k.at n=6A227915Numbers k such that Bernoulli number B_{k} has denominator 3404310.at n=8A295596